Weird Science

BY Michelle Garcia

August 11 2011 1:45 AM ET

Study: Gay Men Compete to Be Thin2010: Competition and not personal desires are what drive straight women and gay men to lose weight, according to a study published in the Journal of Evolution and Human Behavior. The study found a natural competitive instinct among individuals of both groups to compare themselves to others who are seen as more successful. The study did not find the same results among lesbians or heterosexual men.